Fire extinguisher



May 12, 1931- J. R. BOYD FIRE EXTINGUISAHER led July 17, 3.929

involved lacks several very important feathe device with the upper end thereof shown a0 the latter is not only detrimental to, the Referring in detail to the drawings 1 de 65 Ceptbl@ to evaporation and' expansion due pressed air tank 4, provided with` a closed 7o y preventingthe evaporation of the carbon l1 referab1y uniform, although the same may 75 the character described which is highly fixed tothe latter by welding, or in any so `Patented May 12, 1931 i i Y A,

s reinar orrice unirse ,srara Joann.. BOYD, or rirfrsisnnerr, rnnnsvnvenia, Assrenon To Bonner L. WICKLINE,

` or rrrfrsncnsi-r, PENNSYLVANIA FERE EXTNGUISHEB Application filed July 17, 1929. SerialNo. V578,933.

My invention relates to certainnew vand without departing vfrom kthe spirit of the useful improvements in fire extinguishers invention. employing carbon tetra-chloride solution as In the drawings wherein like numerals of Y ya fire damping medium, and somewhat of reference designate j corresponding parts f 5 the type disclosed in my United States throughoutl the several views: 4 n e 55y Patent No. 1,671,398. Figurel is a top plan view ofa re exv The lire extinguisher disclosed in the tinguisher constructed in accordance with above Amentioned patent has proven unsucthe invention. v v cessful, owing tothe fact that the4 invention Figure 2 is a V fragmentaryside view of tures imperative` to the successful operain cross section.

tion of a device of this kind.` f Figure 3" is a side view vof the device with Y It is well known that air under pressure the lower end thereof shown in cross secwill condense moisture, and the presence of tion.

container but deteriorates the carbon tetra'- lOteS a Cylindrical, Veltally ClSpOSeCl tank, chloride, and thereby diminishes its eilihaving a closed bottom 2, and provided for ciency as afire extinguishing agent. Furstoring the carbon tetra-chloride solution ther, as carbon tetra-chloride is very sus-Ky 8. A cylindrical, vertically disposed, comto temperature changes, and as itV is essenbottom 5, is mounted in the solution tank 1. tial to maintain the carbon tetrachloride The air tank bottom 'isrounded and rests .Y under normal atmospheric pressure, it has upon the solution tank bottom 2. The relbeen found necessary to provide means for ative capacities of the tanks 1 and 4 are e tetrachloride rsolution and for permitting be varied to meet conditions found in pracof its expansion within its container. y tice. Y

Important objects of the present inven-y A closurehead 6 covers the upper open tion are to provide a lire extinguished of ends of the tanks 1 and 4, and is preferably efficient in lextinguishing res of Aany nature, other suitable manner to hermetically seal whichembodies novel means for expelling. the tanks 1 and 4. The air tank 4 isrsupall moisture fromthe'air' compression tank, ported by the closure head 6 and sur-y A which functions automatically for main- .IOuldelby the CalfbOIlgtBtTa-CMOI'G 501111 taining the carbon tetra-chlorideY solution tion Q'inthe tank 4. Q n Se under normal atmospheric pressure whileA A Charging valve 7, blOW-O kValve 8, a preventing the evaporation of said solution, control valve. 9, and a relief `valve 10, are which is simple in its construction and arall suitably and vdetachably mounted on the rangement, compact, durable and efficient ClOSure head 6. The vcharging Valve'? com in its use, and comparatively inexpensive municates with theair tank 4, and a con- 90 to manufactureand operate.V l I -duit 11 establishes communication between With the foregoing and other objectsl vthe charging valve 7 and the solution tank 1.

in view which will appear as the description The blow-off valvel 8 communicates l.with proceeds, the invention `resides in the com the air tank 4 and carries a vertically disf bination and arrangement of parts and in posed tubel 12. The openlower end 13'of 95 the details of construction hereinafter de'- the llatteris disposed'in close 'proximity to scribed and claimed, it being understood the bottom 5 of the air tank 4. The blowthatchanges lin the precise embodiment of `off valve 8 is provided with a connecting the'invention hereinafter disclosed can be sleeve 14 which isy adapted for connectionk made withiny the scopeV of 'what is claimed with an air supply hose for supplying -the 100 necessary compressed air to the air tank 4 through the tube 12.

The control valve 9 communicates with the solution tank 1 and carries a vertically disposed tube 15. The open lower end 16 of the latter is disposed adjacent to the bottom 2 of the solution tank 1. The control valve 9 is provided with a connecting sleeve 17 for the attachment of the hose 18. The latter carries a nozzle 19 and is adapted for playing the carbon tetra-chloride solution 3 upon the fire to be suppressed. The tubes 12 and 15 are provided to permit of conveniently mounting respective associated valves 8 and 9 upon the top of the closure head 6 as the air pressure is above any other fluids in tanks 1 and 4.

The relief valve 10 communicates with the solution tank 1. The relief valve 10 is formed with a rightangularly extending passage 20, the inner end of which communicates with a valve chamber 21. The relief valve 10 includes a needle valve member 22 for opening and closing the passage 20. A ball valve member 23 is loosely mounted in the chamber 21 and seats in a valve plug `24, which is detachably and adjustably connected to the lower end of the relief valve 10.` The valve plug 24 is formed with a vertically extending passage 25 which establishes communication between the solution tank 1 and the valve chamber 21.

A paiil of pressure gauges 26 and 27 are mounted on the closure head 6, and communicate with respective tanks 1 and 4 for registering the pressures of the fluids within the latter. The closure head 6 is further provided with a plug 28 for supplying the solution to the tank 1 or for draining the solution therefrom.

In practice the operation of my improved fire extinguisher is as follows :-The carbon tetra-chloride solution 3 is poured into the tank 1 through the opening for the plug 28 and the latter replaced in position. The blow-off valve 8 is opened, and air is forced into the air tank 4, through the connecting sleeve 14, blow-off valve 8, and the tube 12', until the desired airpressure is registered on the pressure gauge blow-off valve 8 is closed;

While charging valve 7 is closed, the compressed air within the air tank 4 cannot charge the solution 3 in the tank 1. Except when the device is in actual use, the solution 3 is maintained at normal atmospheric pressure within the tank gencies, the needlev valve member 22 is slightly released to partially open the passage 20. Upon expansion of the solution 3, due to temperature changes, the excess air and solution, Within the tank 1, will automatically actuate the ball valve member 23, and escape through the valve plug passage 25,

27, after which the' 1. When the ex! tinguisher 1s stored for future use or emervalve chamber 21, and the passage 20, thereby eliminating the possibilities of explosion due to such expansion. After the expulsion of such excess air and solution, the ball valve member 23 will automatically re-seat itself by gravity in the valve plug 24, thereby closing the passage 25 and again sealing the tank 1 to prevent loss of the solution 3 by evaporation.

When the extinguisher has been stored for some time, the compressed air within the tank 4 will condense moisture, which will accumulate upon the air tank bottom 5. As ioisture will deteriorate the carbon tetrachloride solution, any such accumulated moisture is first blown from air tank 4, through the tube 12 and connecting sleeve 14, by momentarily releasing the blow-off valve 8 just prior to operating the device.

In operating the device for extinguishing a fire, the moisture is first expelled from the tank 4, as above stated, and the relief valve 10 is closed. The charging valve 7 is now opened admitting the compressed air `from the tank 4 to the tank 1 and charging the solution 3 in the latter. The control valve 9 is regulated to provide the desired stream of solution, which is forced through the tube 15, hose 18, and nozzle 19.

In discontinuing the use of the extinguisher after only a portion of the compressed air and the solution have been used, the control valve 9 and the charging valve 7 are closed, and the relief valve 10, is again partially opened to release and dissipate the air pressure from the solution tank 1. The device is now again ready for storing and re-use when required.

The present invention provides a highly eflicient fire extinguisher which functions perfectly in every respect, and which is particularly essential in rural districts lacking fire lighting facilities.

What I claim is:

1. In combination, a re extinguisher for using carbon tetra-chloride solutionA comprising a solution tank, a compressed air tank, valve-controlled means establishing communication between said tanks, means for regulating the discharge from said solution tank, and means for automatically maintaining atmospheric pressure in said solution tank, lsaid last mentioned means further preventing the entrance of air therethrough to said solution tank.

2. In combination, a fire extinguisher for using carbon tetra-chloride solution comprising a solution tank, a compressed air tank, valve-controlled means establishing communication between said tanks, means for regulating the discharge from said solution tank, and means for automatically maintaining atmospheric pressure in said .solution tank and further for normally pre- 4lli) tetra-chloride solution comprising a venting the escape of the evaporation of said solution in the latter.

3. In combination, a fire extinguisher of the character described for using carbon tetra-chloride solution comprising a solution tank, a compressed air tank mounted within said solution tank, a closure head covering the tops of said tanks, valve-controlled means establishing communication between said tanks, a control valve mounted on said closure head for regulating the discharge from ysaid solution tank, 'a tubular member n communicating with said control valve and having an open lower end to the bottom of said solution'tank, a blowoff valve mounted on said closure head for expelling moisture` from said compressed air tank, and a tubular member communicating with said blow-off lower end disposed adjacent to the bottom of said solution tank.

4;. In combinatioma fire extinguisher of the character described lfor using carbon solution tank, a compressed air tank mounted within said solution tank, a closure head covering the tops of said tanks, valve-controlled means establishing communication between said tanks, a control valve mounted on said closure head for regulating the discharge from said solution tank, a tubular member communicating with said control valve and havingan open lower end disposed adjacent to the bottom of said solution tank, a blowoif valve mounted on said closure head for expelling moisture from said compressed air tank, a tubular member communicating with said blow-off valve and having an open lower end disposed adjacent to the bottom of said solution tank, and an automatically op, erating valve element for maintaining atmospheric pressure in said solution tank and further Jfor normally preventing the escape of the evaporation of said solution in the latter. c v

In testimony whereof I aix my signature.

JOI-IN R. BOYD.

disposed adjacent y valve and having an openk 

